Django REST框架ModelField需要'model_field'kwarg [英] Django REST Framework ModelField requires 'model_field' kwarg

问题描述

我很喜欢Django REST框架。我得到这个奇怪的错误，可能是由简单的事情引起的，我写的很奇怪，因为我多次搜索，找不到任何参考。

模型：

 类记录（models.Model）：
 owner = models.ForeignKey（User，null = True）
 activity = models.ForeignKey（Activity，null = True）
 time_start = models.DateTimeField（null = True）
 time_end = models.DateTimeField（null = True）
 ... 
  

序列化器：

 code> class RecordSerializer（serializers.ModelField）：
 activity = serializers.PrimaryKeyRelatedField（）
 now = datetime.today（）
 owner = serializers.CharField（source ='owner用户名'，read_only = True）
 time_start = serializers.DateTimeField（source ='now'）
 
 class Meta：
 model = Records 
 fields =（owner ，活动，time_start）
  

查看：

  class StartApiView（generics.CreateAPIView）：
 model = Records 
 serializer_class = RecordSerializer 
 
 def pre_save（self， obj）：
 obj.owner = self.request.user 
  

urls：

  urlpatterns = patterns（''，
＃Today app 
 url（r'^ today / $'，views .TodayView.as_view（），name ='today'），
 url（r'^ start / $'，views.StartApiView.as_view（），name ='start'），
 ... 
  

POST请求来自骨干网，JSON所有都是一个dict： { 活性： 1} 。我失踪了什么该视图应该创建一个新的Record对象，其活动ForeignKey字段设置为POST请求中收到的活动并保存。

我得到的错误是： / p>

  ValueError at / times / start / 
 ModelField需要'model_field'kwarg 
  

解决方案

你的序列化器基类是错误的。它应该是 ModelSerializer 而不是ModelField。

  from rest_framework import serializers 
 
类RecordSerializer（serializers.ModelSerializer）：
＃serializer实现
  

I'm kind of new to Django REST Framework. I'm getting this weird error that is probably caused by something simple, I write 'weird' cause I googled it several times and couldn't find any reference.

model:

class Records(models.Model):
    owner = models.ForeignKey(User, null=True)
    activity = models.ForeignKey(Activity, null=True)
    time_start = models.DateTimeField(null=True)
    time_end = models.DateTimeField(null=True)
    ...

serializer:

class RecordSerializer(serializers.ModelField):
    activity = serializers.PrimaryKeyRelatedField()
    now = datetime.today()
    owner = serializers.CharField(source='owner.username', read_only=True)
    time_start = serializers.DateTimeField(source='now')

    class Meta:
        model = Records
        fields = ("owner", "activity", "time_start")

view:

class StartApiView(generics.CreateAPIView):
    model = Records
    serializer_class = RecordSerializer

    def pre_save(self, obj):
        obj.owner = self.request.user

urls:

urlpatterns = patterns('',
    # Today app
    url(r'^today/$', views.TodayView.as_view(), name='today'),
    url(r'^start/$', views.StartApiView.as_view(), name='start'),
    ...

The POST request comes from backbone and the JSON all it has is a dict:{"activity":"1"}. What am I missing? The view is supposed to create a new Records object with the activity ForeignKey Field set to the activity received in the POST request and save it.

The error I get is:

ValueError at /times/start/
ModelField requires 'model_field' kwarg

解决方案

Your serializer base class is wrong. It should be ModelSerializer instead of ModelField.

from rest_framework import serializers

class RecordSerializer(serializers.ModelSerializer):
    # serializer implementation

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